<template>
  <div>
    <!-- 导航区 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/welcome' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类管理</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片区 -->
    <el-card>
      <el-alert
        title="注意：只允许为第三级分类设置相关参数！"
        type="warning"
        :closable="false"
        show-icon
      >
      </el-alert>
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <el-cascader
            expand-trigger="hover"
            v-model="selectedKeys"
            :options="cateList"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>

      <!-- tab 标签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleTabClick">
        <!-- 动态标签区域 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button
            type="primary"
            :disabled="isBtnDisabled"
            @click="addDialogVisible = true"
            >添加参数</el-button
          >
          <!-- 动态列表区 -->
          <el-table :data="manyTableData" border stripe style="width: 100%">
            <el-table-column type="expand" width="38">
              <template slot-scope="scope">
                <el-tag
                  :key="i"
                  v-for="(item, i) in scope.row.attr_vals"
                  closable
                  :disable-transitions="false"
                  @close="handleClose(i, scope.row)"
                >
                  {{ item }}
                </el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
                <!-- <pre>{{ scope.row }}</pre> -->
              </template>
            </el-table-column>
            <el-table-column
              type="index"
              label="#"
              width="50"
            ></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeById(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>

        <!-- 静态标签区域 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button
            type="primary"
            :disabled="isBtnDisabled"
            @click="addDialogVisible = true"
            >添加属性</el-button
          >
          <!-- 静态列表区 -->
          <el-table :data="onlyTableData" border stripe style="width: 100%">
            <el-table-column type="expand" width="38">
              <template slot-scope="scope">
                <el-tag
                  :key="i"
                  v-for="(item, i) in scope.row.attr_vals"
                  closable
                  :disable-transitions="false"
                  @close="handleClose(i, scope.row)"
                >
                  {{ item }}
                </el-tag>
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                >
                </el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                  >+ New Tag</el-button
                >
                <!-- <pre>{{ scope.row }}</pre> -->
              </template>
            </el-table-column>
            <el-table-column
              type="index"
              label="#"
              width="50"
            ></el-table-column>
            <el-table-column
              label="参数名称"
              prop="attr_name"
            ></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  size="mini"
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                  >编辑</el-button
                >
                <el-button
                  size="mini"
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeById(scope.row.attr_id)"
                  >删除</el-button
                >
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <!-- 添加动态/静态参数 -->
    <el-dialog
      :title="'添加' + titleText"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="80px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取消</el-button>
        <el-button type="primary" @click="addParams">确认</el-button>
      </div>
    </el-dialog>

    <!-- 修改动态/静态参数 -->
    <el-dialog
      :title="'修改' + titleText"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="80px"
      >
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取消</el-button>
        <el-button type="primary" @click="editParams">确认</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 父级分类及配置
      cateList: [],
      cateProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      selectedKeys: [],
      //默认显示的页签
      activeName: "many",
      //分类列表
      manyTableData: [],
      onlyTableData: [],
      // 添加表单数据
      addDialogVisible: false,
      addForm: {
        attr_name: "",
      },
      // 添加表单验证
      addFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
      // 修改表单数据
      editDialogVisible: false,
      editForm: {
        attr_name: "",
      },
      // 修改表单验证
      editFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
      // 标签
      inputVisible: false,
      inputValue: "",
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    // 获取级联分类
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200) {
        this.$message.error("获取商品分类失败！");
      }
      this.cateList = res.data;
      // console.log(res.data);
    },
    // 获取参数的列表数据
    async getParamsData() {
      if (this.selectedKeys.length !== 3) {
        this.selectedKeys = [];
        this.manyTableData = [];
        this.onlyTableData = [];
        return;
      }
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        { params: { sel: this.activeName } }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("获取参数列表失败！");
      }
      res.data.forEach((item) => {
        // 把字符串转成数组
        item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : [];
        // 控制文本框的显示与隐藏
        item.inputVisible = false;
        item.inputValue = "";
      });

      if (this.activeName === "many") {
        this.manyTableData = res.data;
        this.manyAttrVals = res.data[0].attr_vals;
      } else {
        this.onlyTableData = res.data;
        this.onlyAttrVals = res.data[0].attr_vals;
      }
    },
    // 选择项发生变化后触发
    handleChange() {
      this.getParamsData();
    },
    // 页签点击事件
    handleTabClick() {
      this.getParamsData();
    },
    // 添加参数页面的关闭事件,关闭后重置页面数据
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    // 添加参数
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          { attr_name: this.addForm.attr_name, attr_sel: this.activeName }
        );
        if (res.meta.status !== 201) {
          this.$message.error("添加参数失败！");
        }
        this.$message.success("添加参数成功！");
        this.addDialogVisible = false;
        this.getParamsData();
      });
    },
    //点击展示修改的对话框
    async showEditDialog(attr_id) {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${attr_id}`,
        { params: { attr_sel: this.activeName } }
      );
      if (res.meta.status !== 200) {
        this.$message.error("查询参数失败！");
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    // 修改参数页面的关闭事件,关闭后重置页面数据
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    // 修改参数
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          { attr_name: this.editForm.attr_name, attr_sel: this.activeName }
        );
        if (res.meta.status !== 200) {
          this.$message.error("修改参数失败！");
        }
        this.$message.success("修改参数成功！");
        this.getParamsData();
        this.editDialogVisible = false;
      });
    },
    // 删除角色
    async removeById(attr_id) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该参数, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      // console.log(confirmResult);
      // 确认返回 confirm ，取消返回 cancel
      if (confirmResult !== "confirm") {
        return this.$message.info("已经取消了删除！");
      }
      const { data: res } = await this.$http.delete(
        `categories/${this.cateId}/attributes/${attr_id}`
      );
      if (res.meta.status !== 200) {
        this.$message.error("删除参数失败！");
      }
      this.$message.success("删除参数成功！");
      this.getParamsData();
    },
    // 提取公用接口参数-标签
    async saveAttrvals(row) {
      const { data: res } = await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(" "),
        }
      );
      if (res.meta.status !== 200) {
        this.$message.error("修改参数失败！");
      }
      this.$message.success("修改参数成功！");
    },
    // 标签关闭
    handleClose(i, row) {
      row.attr_vals.splice(i, 1);
      this.saveAttrvals(row);
    },
    // 标签显示
    showInput(row) {
      row.inputVisible = true;
      // 文本库自动聚焦
      this.$nextTick((_) => {
        this.$refs.saveTagInput.$refs.input.focus();
      });
    },
    // 标签修改提交
    handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = "";
        row.inputVisible = false;
        return;
      }
      row.attr_vals.push(row.inputValue.trim());
      row.inputValue = "";
      row.inputVisible = false;

      this.saveAttrvals(row);
    },
  },
  computed: {
    // 按钮禁用状态
    isBtnDisabled() {
      if (this.selectedKeys.length !== 3) {
        return true;
      }
      return false;
    },
    // 当前选中的三级分类的ID
    cateId() {
      if (this.selectedKeys.length === 3) {
        return this.selectedKeys[2];
      }
      return null;
    },
    // 动态计算标题的文本
    titleText() {
      if (this.activeName === "many") {
        return "动态参数";
      } else {
        return "静态参数";
      }
    },
  },
};
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag + .el-tag {
  margin-left: 10px;
}
.button-new-tag {
  margin-left: 10px;
  height: 32px;
  line-height: 30px;
  padding-top: 0;
  padding-bottom: 0;
}
.input-new-tag {
  width: 90px;
  margin-left: 10px;
  vertical-align: bottom;
}
</style>